K&F Concept 58mm Variable ND Filter ND2-ND400 (1-9 Stops) + Lens Cap + Cleaning Cloth, 18-Layer Coated, Optical Glass

This VND is great. Colour shift is minimal and having such a wide range of 2-400 is excellent when going from bright sunlight to shade. A lovely bonus is it came with a decent lens cap with connector lanyard and a cleaning cloth. There is a slight X pattern when pushed all the way to 400 but that might be due to my use case as I have it mounted on a Moment 18mm Wide Lens on my iPhone 12 Pro.

La qualité optique de ce filtre laisse vraiment à désirer. Photos : première avec le filtre., deuxième sans le filtre.

“Recently purchased this ND filter, but I’m facing focus issues while using it. Image sharpness and autofocus performance are affected. Disappointed with the experience so far.”

Produto ótimo! Alta qualidade!

For BMPCC4K I have been using this K&F Concept 58mm Variable ND Filter for about a month now, and overall I am very satisfied with the quality and performance. It is well-built, slim, and comes with nice extras like a filter cap and cleaning cloth. The rotation is smooth and it fits securely on my lenses without causing vignetting at lower stops. In terms of performance, the “True Color” claim holds up quite well in my experience. Compared to other budget ND filters I’ve tried before, this one introduces very minimal color cast, which saves me a lot of time in post-processing. It performs beautifully in bright outdoor settings, helping to achieve silky smooth water shots and properly exposed videos without cranking up shutter speed. That said, like with all variable ND filters, you should be aware of the x-pattern (cross pattern) issue when pushing it to the higher end of its range. Once you go beyond about 7 stops, the x-pattern can start to appear, especially with wide-angle lenses or if shooting in very bright conditions. This isn’t a flaw specific to this product, but rather a limitation of variable ND filter technology in general. I simply avoid maxing it out and plan my shots accordingly — staying in the lower to mid-range stops avoids the issue completely and still gives me plenty of flexibility. Overall, for the price, this ND filter delivers fantastic value. It’s great for travel, landscape, and video work. Just be aware of how to use it properly to avoid the cross pattern effect. If used within its optimal range, it produces clean, sharp, and color-accurate results. Highly recommended for budget-conscious photographers and videographers who know the limits of variable NDs.